Heavy duty steel tube speaker stand. Built-in Air-Cushion safely mechanism to prevent sudden speaker drops. Tube Diameter: 1.375in (3.5cm). Load capacity: 130 lbs (60kgs) Minimum/Maximum Height: From 43in (110cm) up to more than 7 ft (213cm). Minimum/Maximum Height: From 43in (110cm) up to more than 7 ft (213cm) Base Width: Expandable up to 42in (122cm)